EVL Anonymization

Table of Contents


Products, services and company names referenced in this document may be either trademarks or registered trademarks of their respective owners.

Copyright © 2017–2020 EVL Tool, s.r.o.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts.

EVL Functions

As an ‘EVL value’ in anon-config file, arbitrary EVL functions and expressions can be used. An input field is represented as ‘IN’.

All functions can be used in two ways:

  • with pointers (preferred)
  • without pointers (i.e. as referenced values, “with star”)

Option with pointers is preferred as it can handle NULL values (‘nullptr’ in fact). So these two examples:

str_function(IN)
str_function(*IN)

are basically the same, but the first one might fail in case of using some standard C++ function and NULL value arrive. All EVL functions handle NULLs and (mostly) returns also NULL, so use ‘IN’ for them. In all other cases use better ‘*IN’.

There are these two rules in all EVL string manipulation functions described in this section:

  • When the first argument is a pointer, the function returns also a pointer.
  • When the first argument is ‘nullptr’, the function returns ‘nullptr’ as well.